Home / 212,026.40-317,918.64-87,218.72

Finding the Fourth Proportional to 212,026.40, 317,918.64 and 87,218.72

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Solution

The fourth proportional to 212,026.40, 317,918.64 and 87,218.72 is: 130,778.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,026.40 : 317,918.64 = 87,218.72 : x
  2. Step 2: Convert to fraction form
    212,026.40/317,918.64 = 87,218.72/x
  3. Step 3: Cross multiply
    212,026.40x = 317,918.64 × 87,218.72
  4. Step 4: Simplify right side
    212,026.40x = 27,728,456,844.94
  5. Step 5: Solve for x
    x = 27,728,456,844.94/212,026.40
  6. Step 6: Final answer
    x = 130,778.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.